The velocity dependence of sensitized fluorescence by Robert Alan Sanders

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  • Fluorescence

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Other titlesSensitized fluorescence, The velocity dependence of.
Statementby Robert Alan Sanders
The Physical Object
Paginationvii, 158 leaves :
Number of Pages158
ID Numbers
Open LibraryOL25923320M

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An effusive, velocity filtered, metast Velocity dependence of sensitized fluorescence in collisions of metastable argon and helium atoms with nitrogen: The Journal of Chemical Physics: No 7Cited by: An effusive, velocity filtered, metastable atom beam intersects a supersonic nozzle beam of nitrogen seeded with helium to extend the relative energy range.

The nozzle beam is modulated and the photon signal is extracted from background using a dual-channel photon counter. The velocity dependence of the excitation of mercury to Hg(63P1) by CO(a3Π) was determined in a cross beam experiment by measuring the time-of-flight Cited by: 6. When a hypervelocity projectile with velocity, v, strikes a target, there is a visible flash of impact fluorescence.

If the radiation and the material are in thermodynamic equilibrium, the “intensity”, I, of the light obeys the power law, I ∼ v by: 6. A parametric dependence of the detonation velocity on the charge characteristics is obtained. The fact that the reaction-zone width increases with decreasing charge porosity is explained.

Temperature dependence of the fluorescence spectrum of a naphthalene crystal doped with 2-methylnaphthalene ( X 10 mole 2-MN/mole N) at steady-state excitation into the host exciton band.

Braun et at / Kinetics of the sensitized fluorescence in naphthalene crystals 19 temperature dependence of the host-fluorescence decay times for various guest con- by: The 3p state of Li was excited in He and Ar buffer gases at room temperature ( K) and the time profiles of sensitized fluorescence from the 3s and 3d states were measured.

The 3d←3p endothermic population transfer rates determined from the pressure dependence of the time profiles were ×10 −11 cm 3 s −1 for He and less than 10 −3 cm 3 s −1 for by: 4. Nonlinear attenuation of fluorescence with increasing concentration is illustrated for substrate FS By 20 μM in a 3 × 3 mm cuvette, The velocity dependence of sensitized fluorescence book fluorescence falls below linear dependence upon concentration (square points, Fig.

2A). Its fluorescence is maximal between and μM (Fig. 2A). Equations 1 and 3 have been fitted to the by: Reviews of the first edition:'In Mechanics of the Cell David Boal explains the mechanical properties of the biopolymers found within cells for graduate students in the general The velocity dependence of sensitized fluorescence book and for biotechnologists required to consider added dimensions to their work it represents a comprehensive text that ought to make it a standard reference for many years.'Cited by: A e2 n ð enðÞdn where e is the molar absorptivity c is the velocity of light m is the mass of an electron e is the electron charge n is the refractive index of the medium, N.

A is Avogadro’s number. The integration is carried out over the frequency range associated with the absorption Size: KB. study time-averaged spatial distribution of labeled proteins in protein assemblies.

Prolonged irradiation of a sample at the absorption maximum. of the energy donor label initiates FRET-sensitized fluorescence photobleaching of the energy acceptor label, which was monitored by steady. state fluorimetric measurements.

The time dependence of this fluorescence is fitted to the solution of rate equations which include the mixing rate, atomic lifetimes and any quenching processes. In both systems, the TTA process is confirmed by the near quadratic dependence of the upconverted fluorescence intensity on incident light power, measured by integrating the upconverted delayed.

Direct/Sensitized Emission FRET. performing live Fluorescence Resonance Energy Transfer (FRET) experiments (e.g.

Two- than 10 angstroms, enabling measurements below the resolution of a light microscope. FRET is a distance-dependent interaction between the electronic excited states of two dye molecules where the excitation is File Size: 1MB.

Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic is a form of most cases, the emitted light has a longer wavelength, and therefore lower energy, than the absorbed most striking example of fluorescence occurs when the absorbed radiation is in the ultraviolet region of the spectrum, and thus invisible.

Here k ET is the rate of Förster energy transfer from D to A and k R and k NR are the radiative and non-radiative rates on the donor, respectively. From equation (1), energy transfer is efficient Cited by:   The term ``sensitized luminescence'' in crystalline phosphors refers to the phenomenon whereby an impurity (activator, or emitter) is enabled to luminesce upon the absorption of light in a different type of center (sensitizer, or absorber) and upon the subsequent radiationless transfer of energy from the sensitizer to the activator.

The resonance theory of Förster, which involves only allowed Cited by: In this study, we report the shape dependence of fluorescence polarization from colloidal CdSe nanoplatelets (NPLs).

Despite the symmetry of their cubic unit cell structure, CdSe nanocrystals grow into two-dimensional platelets in the presence of acetate precursors, and the resulting NPLs exhibit polarized emission. The amount of acetate salts introduced during the synthesis plays a critical Cited by: 6.

Protein fluorescence in a small area of the cell (box) is bleached repetitively. Loss of fluorescence in areas outside the box indicates that the fluorescent protein diffuses between the bleached and unbleached by: The cross sections for excitation transfer between the 6 2 P fine-structure substates in rubidium, induced in collisions with noble gas atoms, have been determined in a series of sensitized fluorescence experiments.

Mixtures of rubidium vapor and noble gases at pressures varying in the range 0–5 Torr were irradiated with each component of the second 2 P rubidium doublet in turn and the Cited by: A coordination polymer [Ln(C15H9O9)3(H2O)3]n (1-Ln = Eu(III), Tb(III)) assembled from benzophenonedicarboxylate was synthesized and characterized.

The organic component is shown to sensitize lanthanide-based emission in both compounds, with quantum yields of 36% (Eu) and 6% (Tb). Luminescence of lanthanide coordination polymers is currently described from a molecular by: Experimental determination of the S1 torsional potential of 9,9’-bianthryl in 2-methyl-butane by simultaneous Franck–Condon and band shape analysis of temperature dependent optical fluorescence spectra.

The Journal of Chemical Physics95 (9), DOI: /Cited by: Based on the temperature dependence of the fluorescence and the two-photon excitation characteristics of CDs-Tb-TMPDPA, the nanoprobe can also be used in the anti-counterfeiting.

Our finding opens a new prospect for the use of two-photon sensitized dual-mode fluorescence Author: Huicheng Yan, Hongyuhang Ni, Yiwei Yang, Changfu Shan, Xiaoxi Yang, Xiangkai Li, Jing Cao, Wenyu Wu.

Near-infrared (NIR)-to-visible (vis) photon upconversion (UC) is useful for various applications; however, it remains challenging in triplet–triplet annihilation-based UC, mainly due to the energy loss during the S1-to-T1 intersystem crossing (ISC) of molecular sensitizers.

In this work, we circumvent this energy loss by employing a sensitizer with direct S0-to-T1 absorption in the NIR Cited by: The application of polarised, Doppler-resolved laser-induced fluorescence (LIF) probing of the products scattered from photon-induced ‘half-collision’(photodissociation) and ‘full-collision’(bimolecular reaction) processes is developed to include the velocity dependence of their Cited by: Fluorescence resonance energy transfer (FRET), the radiationless transfer of energy from a donor fluorophore to a closeby acceptor fluorophore, is rapidly gaining importance as a means to study molecular interactions in single cells.

FRET is apparent as quenching of the donor and increased acceptor by: Förster resonance energy transfer (FRET), fluorescence resonance energy transfer (FRET), resonance energy transfer (RET) or electronic energy transfer (EET) is a mechanism describing energy transfer between two light-sensitive molecules (chromophores).

A donor chromophore, initially in its electronic excited state, may transfer energy to an acceptor chromophore through nonradiative dipole. 1,2-Benzanthracene sensitizes the fluorescence of naphthacene built into its crystal lattice.

The phenomenon can be explained by the sensitized delayed fluorescence mechanism. Since the fluorescence intensities of the energy donor and energy acceptor are proportional to the quantity of the components, the effect can be used for analytical by: 2. The incident photon to current conversion efficiency (IPCE) of dye-sensitized solar cells is measured as a function of the incident photon current density.

A characteristic dependence of the IPCE on the incident light intensity with a maximum value for absorbed photon current densities in the range of jγ,abs = cm-2 s-1 is observed for all cells investigated in this by: Förster coupling is the resonant energy transfer between excitons within adjacent QD's (quantum dots).The first studies of Foerster were performed in the context of the sensitized luminescence of solids.

Here, an excited sensitizer atom can transfer its excitation to a neighbouring acceptor atom, via an intermediate virtual photon.

Introduction. Luminescence Resonance Energy Transfer (LRET) is a derivative of the well-known Fluorescence Resonance Energy Transfer (FRET) technique r to FRET, LRET can be used to measure distances and distance changes between donor and acceptor fluorophores attached to specific sites on the protein of interest within the range of Å Cited by: 3.

Use of sensitized fluorescence for the study of the exchange of subunits in protein aggregates. International Symposium in Honor of Gregorio Weber's Seventieth Birthday. SeptemberBocca di Magra, Italy. Resolution of the pH-dependent heterogeneous fluorescence decay of tryptophan by phase and modulation measurements.

Pore size dependence of self-assembled type photonic crystal on dye-sensitized solar cells efficiency utilising Chlorine e6 Article in Journal of Porous Materials 21(2) April with 50 Reads.

Carbon monoxide gas (1 atm pressure) has been vibrationally excited by absorption of infrared light emitted by rich CH4–O2 flames.

The CO issued from a °K porous plate with a laminar flow velocity of 10 cm/sec. It was contained in an annular flow of argon of matched velocity. Resonance fluorescence was observed in the fundamental vibration—rotation band of CO at cm—1 when Cited by: The sensitized fluorescence of the pHrodo™ Red dye increases strongly with decreasing pH.

By referencing the pH-dependent emission of pHrodo™ Red with the pH-insensitive upconversion photoluminescence of the UCNP, we developed a pH-sensor which exhibits a. Dye-sensitized solar cells (DSSCs) have attracted a great deal of attention owing to their inexpensive production and efficient energy conversion [1,2,3,4].The main components of DSSCs are an adsorbed dye sensitizer (referred herein as S), a mesoporous TiO 2 film deposited on a transparent electrode, and a redox electrolyte (most commonly I − /I 3 −).

d The confocal fluorescence mapping images of the dye-sensitized microswimmers, which show that all three dyes are selectively loaded onto the Cited by: The intensity of sensitized fluorescence emission of MANT-ADP bound to myosin depends on the efficiency of fluorescence energy transfer from directly excited tryptophan donors.

If all myosins had the same number of tryptophans located at the same distances from the MANT fluorophore, the intensity of sensitized fluorescence would be the same for Cited by: 7.

Researches in the field of III-V semiconductor photonic devices have initiate applications in a number of disciplines including lighting, optical communications and biomedical engineering. One of the limiting factors for getting better the photonic devices is the carrier relaxation time.

This is the time obligatory for energetic carriers to cool to the edge of their particular bands in a bulk Author: Kathy Kyaw Min, Phyoe Sandar Win, Hla Myo Tun, Zaw Min Naing, Win Khaing Moe. The platinum(II) terpyridine acetylide complex, [Pt(ttpy)(C CPh)]ClO 4 (1, where ttpy = 4′-p-tolylterpyridine), sensitizes the 3 π–π* excited state of 9,diphenylanthracene (DPA) that in turn produces upconverted fluorescence via triplet–triplet annihilation (TTA).

The photoluminescence of 1 is readily quenched by DPA with a rate constant close to the diffusion limit via energy by:. The temperature dependence of the fluorescence linewidth, fit to a single phonon model yields a mean phonon energy of cm Measurements of the temperature dependence of the fluorescence lifetime (us at 14K) shows a sharp decrease beginning at about : M.

Buoncristiani, C. E. Byvik, J. C. Barnes.V. M. Kenkre and F. Sevilla: Thoughts about Anomalous Diffusion: Time-dependent Coefficients versus Memory Functions, in "Contributions to Mathematical Physics: a Tribute to Gerard G.

Emch", ed. T.S. Ali and K.B. Sinha, (Hindustani Book Agency, New Delhi ) p. However, the accessibility of site SC to charged fluorophores is independent of voltage, and there is very little voltage-dependent change in fluorescence intensity, anisotropy, or Cited by:

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